I have got one of those HD IP POE cameras located in a bird box. The camera goes straight into the back of my DVR. I have seven other Hikvision IP POE cameras that are also working with the DVR and they are perfectly okay. However, yesterday, when I switched my PC on and opened iVMS 4200 the camera was down. One of the little circles was greyed out and said the camera was disconnected. I put the camera into another port on the back of the DVR and now none of the little circles are greyed out. There's nothing suggesting the camera disconnected either. However, it's still not working, there's just a grey box. Any idea what could have gone wrong? I'm wondering whether it's just a case that the camera has packed up